alternating-current impedance

简明释义

交流阻抗

英英释义

例句

1.In this experiment, we measured the alternating-current impedance 交流电阻抗 of different materials to compare their conductivity.

在这个实验中，我们测量了不同材料的交流电阻抗 alternating-current impedance以比较其导电性。

2.The alternating-current impedance 交流电阻抗 of the transformer was found to be within acceptable limits during testing.

在测试中发现变压器的交流电阻抗 alternating-current impedance在可接受范围内。

3.High alternating-current impedance 交流电阻抗 can lead to power losses in transmission lines.

高交流电阻抗 alternating-current impedance可能导致输电线路中的能量损失。

4.The engineer calculated the alternating-current impedance 交流电阻抗 of the circuit to ensure it would operate efficiently.

工程师计算了电路的交流电阻抗 alternating-current impedance，以确保其高效运行。

5.Understanding alternating-current impedance 交流电阻抗 is crucial for designing effective filters in audio equipment.

理解交流电阻抗 alternating-current impedance对于设计音频设备中的有效滤波器至关重要。

作文

Understanding the concept of alternating-current impedance is crucial for anyone studying electrical engineering or working with AC circuits. Impedance, which is a measure of how much a circuit resists the flow of electric current, becomes more complex in alternating current (AC) systems compared to direct current (DC) systems. In an AC circuit, the current changes direction periodically, and this introduces additional factors that must be considered when calculating impedance.The alternating-current impedance can be thought of as the total opposition that a circuit offers to the flow of AC. It encompasses not only the resistance but also the reactance. Reactance arises from the presence of inductors and capacitors in the circuit, which store energy temporarily and affect the phase relationship between voltage and current. Therefore, the alternating-current impedance is a complex quantity, typically represented as a combination of resistance (R) and reactance (X).Mathematically, we express alternating-current impedance as Z = R + jX, where j is the imaginary unit. This representation highlights the fact that impedance has both a real part (the resistance) and an imaginary part (the reactance). The magnitude of the impedance can be calculated using the formula |Z| = √(R² + X²), while the phase angle, which indicates the phase shift between the voltage and current, can be found using θ = arctan(X/R).In practical applications, understanding alternating-current impedance is vital for designing and analyzing AC circuits. For example, in power transmission systems, engineers must consider the impedance of transmission lines to ensure efficient power delivery. High impedance can lead to significant voltage drops and power losses, making it essential to optimize the design of the circuit to minimize these effects.Moreover, alternating-current impedance plays a critical role in resonance circuits, where inductance and capacitance are balanced to create conditions for maximum energy transfer. In such circuits, the impedance becomes purely resistive at the resonant frequency, leading to efficient operation. This principle is widely used in radio frequency applications and audio systems, where tuning circuits are designed to achieve specific frequencies.Furthermore, measuring alternating-current impedance is a common practice in troubleshooting and maintaining electrical systems. By analyzing the impedance of a circuit, technicians can identify issues such as short circuits, open circuits, or component failures. Specialized equipment like impedance analyzers can provide accurate readings, allowing for efficient diagnosis and repair.In conclusion, the concept of alternating-current impedance is fundamental in the field of electrical engineering. Its implications extend across various applications, from power systems to electronic devices. A solid grasp of this concept not only enhances one's understanding of AC circuits but also equips engineers and technicians with the necessary tools to design, analyze, and troubleshoot electrical systems effectively. As technology continues to evolve, the importance of mastering alternating-current impedance will only grow, making it a key area of focus for future innovations in electrical engineering and related fields.

理解交流电阻抗的概念对于任何学习电气工程或处理交流电路的人来说都是至关重要的。阻抗是衡量电路抵抗电流流动程度的指标，在交流电（AC）系统中，与直流电（DC）系统相比，变得更加复杂。在交流电路中，电流会周期性地改变方向，这引入了在计算阻抗时必须考虑的额外因素。交流电阻抗可以被视为电路对交流电流流动的总体阻力。它不仅包括电阻，还包括电抗。电抗源于电路中电感器和电容器的存在，它们暂时存储能量，并影响电压与电流之间的相位关系。因此，交流电阻抗是一个复数量，通常表示为电阻（R）和电抗（X）的组合。从数学上讲，我们将交流电阻抗表示为Z = R + jX，其中j是虚数单位。这种表示突出了阻抗具有实部（电阻）和虚部（电抗）的事实。阻抗的大小可以使用公式|Z| = √(R² + X²)来计算，而相位角则可以通过θ = arctan(X/R)来找到。在实际应用中，理解交流电阻抗对于设计和分析交流电路至关重要。例如，在电力传输系统中，工程师必须考虑传输线的阻抗，以确保高效的电力传输。高阻抗可能导致显著的电压降和功率损失，因此优化电路设计以最小化这些影响是至关重要的。此外，交流电阻抗在谐振电路中也发挥着关键作用，在这种电路中，电感和电容平衡以创造最大能量传输的条件。在这样的电路中，阻抗在谐振频率下变为纯电阻，从而实现高效运行。这一原理广泛应用于射频应用和音频系统，其中调谐电路被设计为实现特定频率。此外，测量交流电阻抗是故障排除和维护电气系统中的常见做法。通过分析电路的阻抗，技术人员可以识别出短路、开路或组件故障等问题。专用设备如阻抗分析仪可以提供准确的读数，从而实现高效的诊断和修复。总之，交流电阻抗的概念在电气工程领域中是基础性的。它的影响扩展到各种应用，从电力系统到电子设备。扎实掌握这一概念不仅增强了人们对交流电路的理解，还使工程师和技术人员具备有效设计、分析和故障排除电气系统的必要工具。随着技术的不断发展，掌握交流电阻抗的重要性只会增加，使其成为电气工程及相关领域未来创新的关键关注点。